Most people classified as blind still retain some ability to see. They often have significantly impaired vision but can discern light, shapes, or other figures. Low vision refers to a class of visual impairment that cannot be corrected by glasses or contact lenses. A number of conditions may cause low

The cornea is present as a clear tissue that is located at the front of the eye. A corneal ulcer occurs when there is a sore in the layer of the cornea. Symptoms of this include redness, drainage, visual disturbances, sensitivity to light, itching and discomfort.
Causes and Effects of Corneal Ulcers
The

Caused by the same irritants as hay fever, runny nose, coughing, and sneezing, eye allergies commonly affect those who suffer from other allergy symptoms. Not only do eye allergies cause discomfort, but they can also interfere with daily activities.
Eye Allergy Causes
Medically referred to as allergic

Conjunctivitis, also known as pink eye, is a common eye problem that can afflict children and adults alike. It is highly contagious and spreads quickly in environments like classrooms or offices filled with multiple people in close proximity to one another. The good news is that conjunctivitis is easily

Ocular rosacea, an inflammation of the eye and/or eyelid, occurs in conjunction with rosacea of the skin. A chronic inflammatory condition, rosacea primarily affects the face, cheeks, forehead, and chest area. When rosacea affects the eyes and/or eyelids, the condition is known as ocular rosacea.
Ocular

Seeing a spot or a flash of light in your field of vision is more than an inconvenience. It could be the first signs of a detached retina. A retina becomes detached when separated from underlying layers of support tissue. Detached retinas will lead to a permanent loss of vision if they are not quickly

If you suffer from Bell's palsy, a paralysis of one side of the face caused by nerve inflammation, you may lose control over your eyelids. This eyelid paralysis can create problems for the sensitive cornea that protects the eye's lens and helps focus light waves into clear images. Fortunately, an experienced

Stinging, irritated eyes, and blurred vision may indicate nothing more than a case of blepharitis -- an unpleasant but, in most cases, relatively harmless condition. Blepharitis is a chronic eyelid inflammation caused by a variety of irritants and/or the inability to maintain proper eye lubrication.

A stye, sometimes spelled as "sty," is a red, painful bump near the edge of the eyelid. It may look like a pimple or abscess, and it can form on the inside or outside of the eyelid. A stye is actually a localized infection that usually disappears by itself after a few days, although in rare cases, a

Many correctable vision problems are caused by abnormal eye anatomy. Very few people have perfectly shaped eyes that facilitate ideal vision. Rather, most people have some degree of abnormal curvature or other anatomical irregularities that cause slight visual changes. Astigmatism is one common form

A chalazion is the medical term for a slowly developing lump on the eyelid that occurs due to an oil gland blockage. At first, the eyelid may appear to be red, tender and swollen. After several days, the chalazion will form on the eyelid, appearing as a slow growing lump. While it is initially painless

An eye occlusion is a blockage in one of the arteries or veins supplying blood to the retina and/or optic nerve. These blockages can cause severe and sudden vision loss. Contact your eye care professional immediately if you experience sudden vision loss, and follow up right away with your family doctor.

Visual perception refers to a set of skills used to collect and interpret visual information taken in from our environment. The visual information gathered is combined with our other senses, allowing us to derive meaning from what we see. Through the process of merging visual data with our other senses,

Also known as demyelinating optic neuritis, optic neuritis refers to the inflammation of the optic nerve due to the loss of or damage to a protective covering called myelin, which surrounds the optic nerve. The myelin is essential to the function of the optic nerve. A more general term, optic neuropathy,

Pronounced SHOW-grins, Sjogren's syndrome is a disorder of the immune system, or an autoimmune disease, which causes the body's immune system to attack and harm the body's glands. Your glands are responsible for the production of saliva, tears, and other lubrication necessary for the proper function

Uveitis refers to the inflammation of the eye's middle layer, which consists of the iris, ciliary body, and choroid. Several fungal, viral, or bacterial infections lead to uveitis, as do certain autoimmune (systemic) and inflammatory conditions. In most cases of uveitis, however, the exact cause is unknown.
Types